US4983457A
Expired / Lapsed
US
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High strength, ultra high modulus carbon fiber
Assignee: Tonen General Sekiyu KK
•
Filing: 1990-02-22
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Granted: 1991-01-08
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Expires: 2010-02-22
Abstract
Abstract A high strength, ultra high modulus carbon fiber is characterized by the presence of the (112) cross-lattice line and the resolution of the diffraction band into two distinct lines (100) and (101), which indicate the three-dimensional order of the crystallite of the fiber. It has an interlayer spacing (d 002 ) of 3.371 to 3.40 Å; a stack height (Lc 002 ) of 150 to 500 Å; and a layer size (La 110 ) of 150 to 800 Å.
Inventors
- 👤 Takashi Hino
- 👤 Hiroyuki Kurodo
- 👤 Kaoru Hirokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:54
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/32; D01F9/322; D01F9/145; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A high strength, ultra high modulus carbon fiber characterized by the presence of the (112) cross lattice line and the resolution of the defraction band into two distinct lines (100) and (101), which indicate the three dimensional order of the crystallite of the fiber; an interlayer spacing (d 002 ) of 3.371 to 3.40 Å; a stack height (Lc 002 ) of 170 to 350 Å; and a layer size (La 110 of 200 to 450 Å, wherein said carbon fiber as a tensile strength of 3.0 GPa or more and a modulus of elasticity of 600 GPa or more.
Claim 2
Dependent Claim
100 words
A high strength, ultra high modulus carbon fiber characterized by the presence of the (112) cross lattice line and the resolution of the defraction band into two distinct lines (100) and (101), which indicate the three dimensional order of the crystallite of the fiber; an interlayer spacing (d 002 ) of 3.371 to 3.40 Å; a stack height (Lc 002 ) of 170 to 350 Å; and a layer size (La 110 of 200 to 450 Å, wherein said carbon fiber as a tensile strength of 3.0 GPa or more and a modulus of elasticity of 600 GPa or more.
Claim 3
Dependent Claim
16 words
A carbon fiber according to claim 1, having a orientation angle (φ) of 3° to 12°.
Claim 4
Dependent Claim
38 words
A carbon fiber according to any of claims 1 or 3, wherein the R value obtained by Raman spectroscopy is 0.05 to 0.30 and the peak position of the higher kayser band is 1585 cm -1 or less.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |